<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
      <header>
          <ul>
              <li><a href="#">首页</a></li>
              <li><a href="#">音乐</a></li>
              <li><a href="#">电影</a></li>
          </ul>
      </header>
      {% block "content"%}
        hello萨达萨达是
      {% endblock %}
      <footer>
          网站尾部
      </footer>
</body>
</html>